Apparatus for preventing print offset



Oct. 1'5, 1935. PlNDER 2,017,257

APPARATUS FOR PREVENTING PRINT OFFSET Filed Jan. 2, 1932 4 Sheets-Sheetl INVENTOR. Thoma E'Hrzeier A TTORNE Y.

' Oct. 15, 1935. ip, P|NDER 2,017,257

APPARATUS FOR PREVENTING PRINT OFFSET Filed Jan. 2, 1932 4 Sheets-Sheet2 N I v FNVENTOR.

3 Tlzomw'fipirzder A TTORNEY.

APPARATUS FOR PREVENTING PRINT OFFSET Filed Jan. 2 1952 4 Sheets-Sheet 51N1 ENTOR. 772021106 lfptnde'r A TTORNE Y.

Patented Oct. 15, 1935 UNITED STATES PATENT oer-ice APPARATUS FoaPREVENTING ram orrsn'r Thomas Fenn Pinder, Merion, Pa.

Application January 2, 1932, Serial No. 584,471

8 Claims. (01.101-416) 10 the machine stops and enables the properfeeding of the web of paper through the press without interference withmy apparatus.

It is also an object of my invention to design an apparatus that willcreate the desired heat intensity, will provide the proper quantitativedischarge of ozone of the proper concentration upon the ink and whichwill destroy the ozone after the useful application thereof. 4

A feature of my invention resides in the use of 20 a unique adjustablesupport for the ozone nozzles and associated parts whereby the nozzlesmay be quickly brought into relation with the paper feeding rolls andthen fine micrometer adjustments accomplished for assuring accuraterela- 25 tion between theoutlets of the nozzles and the surface of theprinted sheet.

My improved apparatus incorporates driers for generating excessive heatand high concentration of ozone for instantaneous application to the ink30 and immediately thereafter completely destroy the applied ozone andheat.

With these and other objects in view the invention will be betterunderstood from the following detailed description taken in connectionwith the accompanying drawings, wherein:

Figure 1 is an end elevation of my improved apparatus.

Figure 2 is a side elevation thereof Figure 3 is across sectional view.

40 Figure 4 is a diagrammatic view of a portion My apparatus is appliedto the frame I of the printing machine without alteration thereto.Mounted directly upon this frame is a heating device illustrated as adrum 2 around which the 55 paper web 3 travels. This drum is heated inany suitable manner preferably by a fluid such as steam, hot water orhot oil. Encasing the major portion of the peripherial surface of thedrum 2 and a portion of the end walls thereof is a hood 4 including adeflector 5, of a flexible construction 5 .so as to move with the hoodwhen the latter is retracted from the drum in a manner hereinafterdescribed. This hood 4 has side flanges 6 paralleling the end walls ofthe drum and the hood and is further provided with outlets I which 10communicate with conduits 8 that communicate with ozone destroyingapparatus 9, that in turn communicate with coolers I 0 each of which maybe of a specialradiator type well known on the market.

cals that will destroy the ozone as passing thereby. Housed within thehood 4 is my improved ozonator l3 consisting of a plurality of nozzlesl4 communicating with an ozone feeding pipe l5. As shown in Figure 6,these nozzles extend the length of the drum and have their outlets inclose proximity to the periphery of the drum which I have found fromactual experience is very, very important as it is absolutely necessarythat ozone of the proper concentration be instantly projected onto theink as passing thereby. I have found from actual experience that heatwill destroy ozone but what is most important is the fact that the heatwill so rapidly expand the ozone that its concentration is lowered. Itis also important that the ozone outlets or slits be arranged in closeproximity to the ink and this ozone be chilled by cooling systemindicated broadly by the numeral l6. It is also important, in view ofthe small time interval of application available, approximating aboutone-half second. This cooling system l6 includes distributor pipes I!communicating with cooling jackets l8 surrounding the nozzles or slitsl4. It may be advisable to provide an insulating covering I 8 for thecooling Jackets. Also associated with the hood 4 is a cooling device 20positioned to cool the hood and prevent radiation of heat therefrom intothe surrounding atmosphere. Carried by the hood 4 is an electric heater2| that performs the dual function of assisting the heat of the drum 2by absorption from the top of the ink and also destroying any ozonetending to leave the hood. I have found from actual ex: perience that itis very important that the ink be brought .to the required temperatureand I have chine stops operation.

found that this can be satisfactorily accomplished by providing aheating roll for directly heating the paper and through the paper theink and providing a radiant heat for directly projecting heat rays ontothe wet ink which in turn absorbs rapidly: This radiant heater isdirectly carried by the hood so as to move therewith when the hood iswithdrawn from the drum 2 in a manner now to be described.

The hood and associated parts including the ozone destroying apparatusare mounted on a carriage 22that in turn slides on the frame I and ismechanically moved by a shaft 23 provided with gears 24 meshing withrack bars 25 directly connected to the carriage. .An operatormanipulating the handle 26 attached to the shaft will move the carriagetoward and away from the drum. As the distance between the outlets ofthe ozone nozzles and the ink to be treated has a definite controllinginfluence upon the successful drying of the ink, it is very importantthat the outlets of the ozonator be fixed in a definite relation to theperipheral surface of the drum. I readily accomplish this by providing amicrometer set screw 21 mounted in the path of travel of the lug 28 orthe carriage so as to abut therewith when the nozzles are at the properdistance from the periphery of the drum. When this has beenaccomplished, a lock bolt 29 'is drawn into locking position to hold thecarriage in its adjusted position. Bythis construction it will beappreciated that the carriage and associated parts may be quickly movedinto accurate relation with the drum 2 and immediately removed therefromto allow proper feeding of the paper, web through the press and toimmediately remove heat from the paper web when the ma- I have foundfrom actual experience that there. is a decided advantage to be obtainedfrom pro-- viding temperature regulators 3| contiguous to the forwardposition of the drum 2 so as to resulate the temperature of the web ofpa r. The temperature regulators 30 are pivotally ounted to swing towardand away from the periphery of the drum 2 and may be manuallymanipulated by the link mechanism 30b. These temperature regulators arein the form of hollow segments 3i intercommunicating with each otherthrough hose connections 32 and a source of cooling fluid.

Associated with the temperature regulators I is a hollow cooling drum 33over which the web 3 passes in leaving the treating apparatus.

In Figure 9 I have shown a cleaner 34 associated with the ozonedischarging apparatusv construction well heating drum around which afreshly printed web of paper is adapted to pass, ink drying fluid jetmeans arranged about a section of said drum,

'and means for subjecting the printed web of paper to a coolingtreatment at a predetermined point in its travel over the periphery ofthe drum.

aortas":

3. An ink treating apparatus comprising a heating drum around which afreshly printed web of paper is adapted to pass, ink drying fluid jetmeans arranged about a section of said drum,

means for subjecting the printed web of paper to a cooling treatment ata predetermined point in its travel over the periphery of the drum, saidlast mentioned means including a plurality of adjustably mounted coolingsegments, and a link mechanism interconnecting said segments foruniformly adjusting the same in relation to the web of paper passingover the surface of the drum.

4. An ink treating apparatus comprising a heating drum around which afreshly printed web of paper is adapted to pass, ink drying fluid jetmeans arranged about the normal rear section of said drum, means forsubjecting the printed web of paper to a cooling treatment at apredetermined point in its travel over the periphery of the drum, saidlast mentioned means including a pair of cooling segments, each disposedon the opposite normal forward sections of the drum and mounted foradjustment with respect thereto, and a link mechanism interconnectlngsaid segments for uniformly adjusting the same in relation to the web ofpaper passing 'over the surface of the drum.

5. An ink treating apparatus comprising in combination, a heating drumaround which a freshly printed web of paper is adapted to pass, inkdrying fluid jet means arranged about a section of said drum, heatingmeans positioned about another section of said drum, a hood encasing themajor portion of the drum and mounted for movement with respect thereto,said hood en-, closingand supporting the jet means and the heatingmeans, and a cooling device disposed upon the outer face of said hood.

6. An ink treating apparatus comprising in 40 combination, a heatingdrum around which a freshly printed web of paper is adapted to pass, inkdrying fluid jet means, arranged about a section of said drum, heatingmeans positioned about another section of said drum, a hood choosing the.major portion of the drum and mounted for outer face of said hood andmade rigid therewith,

and means adjustably supporting said hood for moving ,the lattertogether with the jet. means, the heating means, and cooling device as aunit in relation to the surface of said drum.

7. Anink treating apparatus comprising in on combination, a heating drumaround which a freshly printed web of paper is adapted to pass. abattery of oaonators arranged about a section of said am, a heaterpositioned about another section of said drum, a hoodencasing the majorportion of the drum andmounted for movement with respect thereto,,said'hood enclosing and supporting the battery of osonators and theheater, a cooling device disposedupon the outer face of said hood andmade rigid therewith and means adiustably supporting said hood formoving the same, together with the battery of ozonators, heater, andcooling device. as a unit, in relation to the surface of said drum.

8. An ink treating apparatus comprising in n combination, a heating drumaround which a freshlyprinted web of paper is adapted to pass,

a battery'of dzoriators arranged about a section of said drum, a heaterpositioned about another section of said drum, a hood encasing themajorportion of the drum and mounted for movement with respect thereto, saidhood enclosing and supporting the battery of ozonators and the heater, acooling device disposed upon the outer face of said hood and made rigidtherewith,

means adjustably supporting said hood for moving the same, together withthe battery of ozonators, heater, and cooling device as a unit inrelation to the surface of the drum, and a cooling ciated with saidcooling unit for displacing the same with respect to the drumindependently of said hood.

THOMAS PENN FINDER.

